+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
defmodule Pleroma.Web.ActivityPub.Transmogrifier do
@moduledoc """
A module to handle coding from internal to wire ActivityPub and back.
@doc """
Checks that an imported AP object's actor matches the domain it came from.
"""
- def contain_origin(id, %{"actor" => actor} = params) do
+ def contain_origin(_id, %{"actor" => nil}), do: :error
+
+ def contain_origin(id, %{"actor" => _actor} = params) do
id_uri = URI.parse(id)
actor_uri = URI.parse(get_actor(params))
end
end
+ def contain_origin_from_id(_id, %{"id" => nil}), do: :error
+
+ def contain_origin_from_id(id, %{"id" => other_id} = _params) do
+ id_uri = URI.parse(id)
+ other_uri = URI.parse(other_id)
+
+ if id_uri.host == other_uri.host do
+ :ok
+ else
+ :error
+ end
+ end
+
@doc """
Modifies an incoming AP object (mastodon format) to our internal format.
"""
def fix_object(object) do
object
|> fix_actor
+ |> fix_url
|> fix_attachments
|> fix_context
|> fix_in_reply_to
attachments =
attachment
|> Enum.map(fn data ->
- url = [%{"type" => "Link", "mediaType" => data["mediaType"], "href" => data["url"]}]
- Map.put(data, "url", url)
+ media_type = data["mediaType"] || data["mimeType"]
+ href = data["url"] || data["href"]
+
+ url = [%{"type" => "Link", "mediaType" => media_type, "href" => href}]
+
+ data
+ |> Map.put("mediaType", media_type)
+ |> Map.put("url", url)
end)
object
def fix_attachments(object), do: object
+ def fix_url(%{"url" => url} = object) when is_map(url) do
+ object
+ |> Map.put("url", url["href"])
+ end
+
+ def fix_url(%{"type" => "Video", "url" => url} = object) when is_list(url) do
+ first_element = Enum.at(url, 0)
+
+ link_element =
+ url
+ |> Enum.filter(fn x -> is_map(x) end)
+ |> Enum.filter(fn x -> x["mimeType"] == "text/html" end)
+ |> Enum.at(0)
+
+ object
+ |> Map.put("attachment", [first_element])
+ |> Map.put("url", link_element["href"])
+ end
+
+ def fix_url(%{"type" => object_type, "url" => url} = object)
+ when object_type != "Video" and is_list(url) do
+ first_element = Enum.at(url, 0)
+
+ url_string =
+ cond do
+ is_bitstring(first_element) -> first_element
+ is_map(first_element) -> first_element["href"] || ""
+ true -> ""
+ end
+
+ object
+ |> Map.put("url", url_string)
+ end
+
+ def fix_url(object), do: object
+
def fix_emoji(%{"tag" => tags} = object) when is_list(tags) do
emoji = tags |> Enum.filter(fn data -> data["type"] == "Emoji" and data["icon"] end)
def fix_content_map(object), do: object
+ defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
+ with true <- id =~ "follows",
+ %User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
+ %Activity{} = activity <- Utils.fetch_latest_follow(follower, followed) do
+ {:ok, activity}
+ else
+ _ -> {:error, nil}
+ end
+ end
+
+ defp mastodon_follow_hack(_, _), do: {:error, nil}
+
+ defp get_follow_activity(follow_object, followed) do
+ with object_id when not is_nil(object_id) <- Utils.get_ap_id(follow_object),
+ {_, %Activity{} = activity} <- {:activity, Activity.get_by_ap_id(object_id)} do
+ {:ok, activity}
+ else
+ # Can't find the activity. This might a Mastodon 2.3 "Accept"
+ {:activity, nil} ->
+ mastodon_follow_hack(follow_object, followed)
+
+ _ ->
+ {:error, nil}
+ end
+ end
+
# disallow objects with bogus IDs
def handle_incoming(%{"id" => nil}), do: :error
def handle_incoming(%{"id" => ""}), do: :error
# - tags
# - emoji
def handle_incoming(%{"type" => "Create", "object" => %{"type" => objtype} = object} = data)
- when objtype in ["Article", "Note", "Video"] do
+ when objtype in ["Article", "Note", "Video", "Page"] do
actor = get_actor(data)
data =
end
end
- defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
- with true <- id =~ "follows",
- %User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
- %Activity{} = activity <- Utils.fetch_latest_follow(follower, followed) do
- {:ok, activity}
- else
- _ -> {:error, nil}
- end
- end
-
- defp mastodon_follow_hack(_), do: {:error, nil}
-
- defp get_follow_activity(follow_object, followed) do
- with object_id when not is_nil(object_id) <- Utils.get_ap_id(follow_object),
- {_, %Activity{} = activity} <- {:activity, Activity.get_by_ap_id(object_id)} do
- {:ok, activity}
- else
- # Can't find the activity. This might a Mastodon 2.3 "Accept"
- {:activity, nil} ->
- mastodon_follow_hack(follow_object, followed)
-
- _ ->
- {:error, nil}
- end
- end
-
def handle_incoming(
- %{"type" => "Accept", "object" => follow_object, "actor" => actor, "id" => id} = data
+ %{"type" => "Accept", "object" => follow_object, "actor" => _actor, "id" => _id} = data
) do
with actor <- get_actor(data),
%User{} = followed <- User.get_or_fetch_by_ap_id(actor),
local: false
}) do
if not User.following?(follower, followed) do
- {:ok, follower} = User.follow(follower, followed)
+ {:ok, _follower} = User.follow(follower, followed)
end
{:ok, activity}
end
def handle_incoming(
- %{"type" => "Reject", "object" => follow_object, "actor" => actor, "id" => id} = data
+ %{"type" => "Reject", "object" => follow_object, "actor" => _actor, "id" => _id} = data
) do
with actor <- get_actor(data),
%User{} = followed <- User.get_or_fetch_by_ap_id(actor),
end
def handle_incoming(
- %{"type" => "Like", "object" => object_id, "actor" => actor, "id" => id} = data
+ %{"type" => "Like", "object" => object_id, "actor" => _actor, "id" => id} = data
) do
with actor <- get_actor(data),
%User{} = actor <- User.get_or_fetch_by_ap_id(actor),
end
def handle_incoming(
- %{"type" => "Announce", "object" => object_id, "actor" => actor, "id" => id} = data
+ %{"type" => "Announce", "object" => object_id, "actor" => _actor, "id" => id} = data
) do
with actor <- get_actor(data),
%User{} = actor <- User.get_or_fetch_by_ap_id(actor),
update_data =
new_user_data
|> Map.take([:name, :bio, :avatar])
- |> Map.put(:info, Map.merge(actor.info, %{"banner" => banner, "locked" => locked}))
+ |> Map.put(:info, %{"banner" => banner, "locked" => locked})
actor
|> User.upgrade_changeset(update_data)
end
end
- # TODO: Make secure.
+ # TODO: We presently assume that any actor on the same origin domain as the object being
+ # deleted has the rights to delete that object. A better way to validate whether or not
+ # the object should be deleted is to refetch the object URI, which should return either
+ # an error or a tombstone. This would allow us to verify that a deletion actually took
+ # place.
def handle_incoming(
- %{"type" => "Delete", "object" => object_id, "actor" => actor, "id" => _id} = data
+ %{"type" => "Delete", "object" => object_id, "actor" => _actor, "id" => _id} = data
) do
object_id = Utils.get_ap_id(object_id)
with actor <- get_actor(data),
- %User{} = _actor <- User.get_or_fetch_by_ap_id(actor),
+ %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
{:ok, object} <- get_obj_helper(object_id) || fetch_obj_helper(object_id),
+ :ok <- contain_origin(actor.ap_id, object.data),
{:ok, activity} <- ActivityPub.delete(object, false) do
{:ok, activity}
else
%{
"type" => "Undo",
"object" => %{"type" => "Announce", "object" => object_id},
- "actor" => actor,
+ "actor" => _actor,
"id" => id
} = data
) do
User.unfollow(follower, followed)
{:ok, activity}
else
- e -> :error
+ _e -> :error
end
end
- @ap_config Application.get_env(:pleroma, :activitypub)
- @accept_blocks Keyword.get(@ap_config, :accept_blocks)
-
def handle_incoming(
%{
"type" => "Undo",
"id" => id
} = _data
) do
- with true <- @accept_blocks,
+ with true <- Pleroma.Config.get([:activitypub, :accept_blocks]),
%User{local: true} = blocked <- User.get_cached_by_ap_id(blocked),
%User{} = blocker <- User.get_or_fetch_by_ap_id(blocker),
{:ok, activity} <- ActivityPub.unblock(blocker, blocked, id, false) do
User.unblock(blocker, blocked)
{:ok, activity}
else
- e -> :error
+ _e -> :error
end
end
def handle_incoming(
- %{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = data
+ %{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = _data
) do
- with true <- @accept_blocks,
+ with true <- Pleroma.Config.get([:activitypub, :accept_blocks]),
%User{local: true} = blocked = User.get_cached_by_ap_id(blocked),
%User{} = blocker = User.get_or_fetch_by_ap_id(blocker),
{:ok, activity} <- ActivityPub.block(blocker, blocked, id, false) do
User.block(blocker, blocked)
{:ok, activity}
else
- e -> :error
+ _e -> :error
end
end
%{
"type" => "Undo",
"object" => %{"type" => "Like", "object" => object_id},
- "actor" => actor,
+ "actor" => _actor,
"id" => id
} = data
) do
|> prepare_attachments
|> set_conversation
|> set_reply_to_uri
+ |> strip_internal_fields
+ |> strip_internal_tags
end
# @doc
data =
data
|> Map.put("object", object)
- |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+ |> Map.merge(Utils.make_json_ld_header())
{:ok, data}
end
data =
data
|> Map.put("object", object)
- |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+ |> Map.merge(Utils.make_json_ld_header())
{:ok, data}
end
data =
data
|> Map.put("object", object)
- |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+ |> Map.merge(Utils.make_json_ld_header())
{:ok, data}
end
data =
data
|> maybe_fix_object_url
- |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+ |> Map.merge(Utils.make_json_ld_header())
{:ok, data}
end
end
def add_mention_tags(object) do
- recipients = object["to"] ++ (object["cc"] || [])
-
mentions =
- recipients
- |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
- |> Enum.filter(& &1)
+ object
+ |> Utils.get_notified_from_object()
|> Enum.map(fn user ->
%{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"}
end)
|> Map.put("attachment", attachments)
end
+ defp strip_internal_fields(object) do
+ object
+ |> Map.drop([
+ "likes",
+ "like_count",
+ "announcements",
+ "announcement_count",
+ "emoji",
+ "context_id"
+ ])
+ end
+
+ defp strip_internal_tags(%{"tag" => tags} = object) do
+ tags =
+ tags
+ |> Enum.filter(fn x -> is_map(x) end)
+
+ object
+ |> Map.put("tag", tags)
+ end
+
+ defp strip_internal_tags(object), do: object
+
defp user_upgrade_task(user) do
old_follower_address = User.ap_followers(user)
def upgrade_user_from_ap_id(ap_id, async \\ true) do
with %User{local: false} = user <- User.get_by_ap_id(ap_id),
{:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id) do
- data =
- data
- |> Map.put(:info, Map.merge(user.info, data[:info]))
-
already_ap = User.ap_enabled?(user)
{:ok, user} =
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